Automatic stop-valve



, t 8 e h s W w h S 3 R E L D T E B A H q d 0 M O w AUTOMATIC STOPVALVE.

Patented Aug; 11, 1896.

(No Model.) 3 Sheets-Sheet. 2.

H. A. BEIDLER.

AUTOMATIC STOP VALVE.

Patented Aug. 11, 1896.

UNITED STATES PATENT @rrrcn.

HERBERT A. BEIDLER, OF CHICAGO, ILLINOIS.

AUTOMATIC STOP-VALVE.

SPECIFICATION forming part of Letters Patent No. 565,424, dated August 11, 1896.

Application filed January 13, 1892. Serial No. 417,913. (No model.)

To all whom it may concern:

Be it known that I, HERBERT A. BEIDLER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Automatic Stop-Valves, of whichthe following is a specification.

My invention relates to improvements in automatic stop-valves forhydraulic elevators and similar purposes; and its object is toautomatically arrest the movement of the elevator-car at predeterminedpoints, in its ascent and descent, near the top and bottom of the well,independently of the position of the valve that controls the flow offluid to the motor, and avoid accidents which may result from thenegligence or want of skill of the operator or the derangement of thevalve-controlling mechanism. I accomplish these obj ects by means ofthemechanism shown in the accompanying drawings, in which like lettersand figures of reference are used to designate similar parts throughout.

Figure 1 is a top View in perspective of my invention. Fig. 2 is a sideelevation of my invention in connection with the main powercylinder andmechanism for hoisting and lowering the elevator-car. Fig. 3 is avertical longitudinal section of the main valve and automatic stop-valvewith their proper ports and pistons. Fig. atis an end view of theextension of the main valve, which is connected with the exhaust. Fig. 5is a cross-sectional view of the inlet supply-chamber, in which is showna sectional View of the lining of the extension of the main valve, whichpasses through said inlet supply-chamber, on the lines 00 y of Fig. 1.Fig. 6 is a cross-sectional view of the piston in the extension A of thevalve on the lines 2 2', Fig. 3. Fig. 7 is a plan view of the open endof the main power-cylinder. Fig. 8 is an end view of the mainpower-cylinder, and Fig. 9 is a detail crosssectional view of the pistonof the main powercylinder carrying one of the collars which engages withthe cam that operates and controls the movement of the pistons in thestopvalves.

Letter A represents the main valve, which contains the reciprocatingpistons and connections which control the passage of the fluid from theinlet-supply to the main powercylinder, and which open and close thepassage-ways and chambers leading to the exhaust or outlet pipe. It alsoincludes and embraces the extensions A A, in which are located,respectively, the reciprocating pistons O and N.

B is an opening connecting the chamber of the main power-cylinder,through the chambers F and G, respectively, with the inletsupply D andthe exhaust C.

E represents the flange of the inlet supplychamber, of which Fig. 5 is across-sectional view.

A is an extension of the main body of the valve, forming, in connectionwith the main body, the chamber H, connecting with the exhaust C. Thisextension is provided with the usual brass or non-corrosive lining m,provided with a series of elongated openings op posite the port of theexhaust 0. Located within this extension A is the hollow or chain beredpiston N, constructed of suficient length to cover and close the port ofthe exhaust C and the belt 32. This piston is surrounded by a groove 33,in which fluid may pass and remain for lubricating purposes. The pistonis provided with openings 1) I), through which the fluid may readilypass into the chamber M and thus equalize the pressure on the oppositesides of the piston. The piston-rod K passes out through the head of theextension A, which is provided with the usual packing-box and formsconnections at 15, as hereinafter explained.

A is an extension of the opposite end of the main body of the valve,forming, in connection with the chamber F in the main body, the chamberLF. This extension is in like manner provided with the usual brass ornoncorrosive lining Z, having a series of elongated openings oppositethe inlet supply-port D. Located Within the chamber of this extension Ais the hollow or chambered piston O, constructed of sut'iicient lengthto cover and close the port of the inlet D and the belt I. This pistonis surrounded by the grooves 13 13, in which fluid may pass and remainfor lubricating purposes. The piston is also provided with openings andpassages a a a o,through which the fluid may easily pass into thechamber L, and thus equalize the pressure on opposite sides of thepiston. The pistonrod J passes out through the head of the extensions A,which is provided with the usual packing-box and forms connections at14, as hereinafter explained.

Within the chamber F is located the double valve 2 and 3, adapted tomeet and tit the respective valve-seats 4 and 6. This valve is connectedby the stem or piston P pivot-ally at p with the lever S. WVithin thechamber G is located a second double valve 7 and 8, adapted to meet andfit the respective valve-seats 11 and 12. This valve is connected by thestem or piston Q, pivotally at q with the lever S.

The lever S carries the weight V and is pivotally connected at t withthe strap or bar T, which connects pivotally at t with the rocking leverU, which is supported piv0tally at u by a permanent standard R. Thelever U is connected at its respective ends by means of cords, cables,or other means with the operating-lever in the elevator-car.

The respective ends of the piston-rods J and K are connected by the bar16, and each is provided with screw-thread and nut or other well-knownmeans at the point where connection is made with the ends of the bar 16,whereby the precise location and movement of the pistons O and N in thecylinders of the extensions A and A can be controlled and limited.

The bar 16 is supported in guides 17 and 18, attached to the respectiveflanges of the ends of the main valve, or they may be attached to anypermanent supports in connection, therewith.

Letter B represents the main power-cylinder, in which is located thepiston 30, to

which is attached the piston-rod 31. Upon the exterior flange of themain cylinder, Fig. 8, are attached boxes 24 and 26, having bearings forthe rock-shaft 25. Rigidly attached to this rock-shaft is a cam 27,having bifurcated projections extending in opposite directions. Attachedto the other end of this shaft at the point 23 is a crank-arm 21, whichconnects pivotally at 22 with the rod 20, and i this latter rod connectspivotally at 15 with the bar 16.

Located rigidly upon the piston-rod 31 at predetermined points withreference to the stroke of the piston and height of the elevator-shaftare two collars 28 and 28, each having an arm or projection carrying awheel or idler 29 of suitable size to engage with the bifurcatedprojections of the cam and pass between them during the outward andinward stroke of the piston.

The construction of my invention having now been described, its mode ofoperation is as follows: In Fig. 3 the rocking lever U is in its normalposition, when both inlet and exhaust ports are closed or cut off fromthe port B, that leads to the main power-cylinder B, and theelevator-car will remain at rest. lVhen the rocking lever U is operatedso as to elevate the point t of the lever S, the opposite end q will befulcrumed upon the valvestem Q and the valve 2 and 3 will be opened andthe fluid can instantly flow from the inlet supply-pipe D into thechamber F and thence to the port B, leading to the main power-cylinderbut it cannot pass into the chamber II and thence to the exhaust-port Oin consequence of the valve 7 and 8 being closed upon the respectivevalve-seats. A reverse movement of the rocking lever U brings it back toits normal position. If this reverse motion is continued until the pointt of the lever S is depressed, the opposite end will be fulcrumed on thevalve-stem P, which has closed the valve 2 and 3. The valve-stem Q, willbe elevated and will open the valve 7 and S. In this condition theelevator-car will begin to descend, and, the fluid from the supply-portbeing cut off, that in the main power-cylinder will escape into thechamber H and thence out through the exhaust'port O. The weight- V onthe lever S tends to restore that lever to its normal position and alsoaids in keeping closed one or the other of the valves 2 or 7 8,alternately, as the rocking lever U is operated.

It will be seen that the pistons O and N, located, respectively, withinthe cylindrical chambers of the extensions A" and A of the main valve,are rigidly connected by means of their respective rods and the bar 16,so that they reciprocate as one piston having two diaphragms with achamber between, closing in one movement the port of the inletsupply-pipe and opening that of the exhaust,and operating vice versainthe reverse movement. Precisely the same united action could be elfectedby connecting these two pistons by an interior stem or piston-rodpassing centrally through openings in the partitions of the main valvefrom one to the other. It will thus be seen that these two pistons N and0 act hydraulically as two independent stop-valves, one of whichcontrols the inlet-port and the other the exhaust-port; but, by reasonof the fact that they are connected by a yoke or other mechanical means,two advantages are gained, to wit: first,the opening of one valve by theautomatic mechanism will simultaneously close the other valve, and theclosing of one valve will likewise simultaneously open the other valve,which function is Very desirable, in that it permits the working pistonin the main cylinder to immediately reverse its stroke when it isdesired, and consequently permits the travel of the cage to beimmediately reversed at either the top or bottom limit of travel;second, the two piston stop-valves being thus connected to hydraulicallyact simultaneously, but reversely, can yet be actuated by a single setof devices for producing the automatic action, which devices will now beset forth.

The collar 28 is located upon the piston-rod 31 at a point indicatingthe limit of outward stroke of the piston when the elevator-car is ward.

ascending. As it is carried forward in the movement of the piston theidler comes in contact with the lower prong or projection 34: of the cam27 and forces it outwardly, rocking the shaft 25 and operating crank-arm21 and forcing the rod 20 and the bar 16 back- This movement of the bar16, which is connected with the piston-rods J and K, operates to forcethe piston 0 forward, closing the port of the inlet supply-pipe and atthe same time carrying the piston N'to a position fully uncovering andopening the exhaust-port. The fluid supply being thus cut off and theexhaust-port open, the upward movement of the elevator-car is arrested.

The moment the extreme limit of stroke of the piston has been reachedand the piston begins to return, the idler 29, which has passed inbetween the upper and lower prongs of the cam 27, will also begin torecede and bear upon the upper prong 35, and will restore the cam andthe stop-valve, consisting of the piston N and O, to normal position.

It will be observed that in its normal position (shown in Fig. 3) thetwo pistons constituting the stop-valve are so adjusted that both theinlet supply-port and the exhaustport are uncovered, leaving the mainvalve to operate independently. It will also be seen that thesafety-stop valve operates independently of the main valve.

\Vhen the piston of the main motor makes its return movement (theelevator-car being on the descent) and it has reached its limit ofstroke, the idler 29 upon the collar 28 engages with the oppositeprojecting prongs of the cam 27, and, in the same manner as abovedescribed, causes the stop-valve, consisting of the pistons N and O, tomove in an opposite direction and close the exhaust and open the inletport, thereby arresting the movement of the piston of the main motor andthe descent of the car.

It is evident there may be many changes and variations in theconstruction and arrangement of parts of my invention without departingfrom the spirit thereof, and I do not limit myself to the preciseconstruction and arrangement shown.

Having thus described my invention, what I claim as new, and desire tosecure byLetters Patent of the United States, is-

1. The combination in a fluid-controlling valve for a motor, of achamber therein provided with the usual waste-supply and motorcylinderports, with a reciprocating valve clevice or mechanism within thechamber adapted to control the said ports, and a safety-stop within thevalve adapted to close said ports when the piston of the main motorreaches its limit of stroke.

2. The combination of a main motor having a piston and piston-rod, saidpiston-rod provided with two collars arranged to engage with a cam, afluid-controlling valve having a chamber therein and provided withports, a reciprocating piston within the chamber; a

safety-stop within said valve adapted to close said ports, meansconnecting said cam with said safety-stop whereby the movements of thepiston of the main motor operate said safety-stop, and open or closesaid ports of the fluid-controlling valve at the limit of stroke of saidpiston and independently of the operation of the main valve; allsubstantially as shown.

3. In a fiuid-controllin g valve a main valve provided with ports andmeans for closing and opening the inlet supply and exhaust ports thereofa chamber extending in opposite directions from and within said mainvalve; one end thereof connecting directly with the inlet supply-portand the other end with the exhaust-port a double piston located withinsaid chamber, united and held together by piston-rods having exteriorconnections with the piston of the main motor, whereby the reciprocatingmovements of the latter at the limit of its stroke may be communicatedto said double piston within the extended chamber of the valvealternately opening and closing the inlet and exhaust ports; allsubstantially as shown.

4. In a fluid-controlling valve, a main cylinder provided with a portleading to the main motor and with chambers connecting respectively withthe inlet and exhaust ports; extensions of said main chamber, A and Arespectively provided with the ports 0 and D; the piston 0 provided withopenings a, a, and a piston-rod J the piston N provided with itsopenings b, b, and a piston-rod K-a connecting-bar 16 and meansconnecting said bar 16 with the cam 27, the collars 28 and 28 adapted toengage with said cam, respectively located upon the piston-rod of themain motor whereby the movement of the said piston-rod of the main motorwill communicate reciprocal motion to the pistons O and N; allsubstantially as shown.

5. In a fluidcontrolling valve, having a chamber within said valve andprovided with ports, and a safety-stop, a hollow chambered pistonprovided with grooves in its outer periphery, and providedwith openingsat, a, and a piston-rod whereby said piston can be operated to open andclose a port within said valve and equalize the pressure of the fluid inthe chamber in the front and rear of said piston; all substantially asshown.

6. The combination with the cylinder and piston of a hydraulic elevator,and independent inlet and outlet passages respectively leading to andfrom the cylinder, with two stop or safety valves, one for controllingthe inlet-passage and the other the outlet-passage,mechanical connectionbetween the two, whereby they may be operated simultaneously torespectively open one port and close the other; substantially as and forthe purpose set forth.

7. The combination with a cylinder and piston of a hydraulic elevator,with two stop or safety valves, adapted to close different ports andmechanically joined to each other,

and appliances through which both of said valves are automaticallyactuated; substantially as and for the purpose set forth.

8. The combination with a cylinder and piston of a hydraulic elevator,of two stop or safety valves, each having its stem projecting beyond thevalve-casing, a rod connecting such stems and appliances forautomatically operating the rod alternately in each direction;substantially as and for the purpose set forth.

9. The combination with a cylinder and piston of a hydraulicIelevator,avalve-casing provided with inlet, outlet and cylinder ports, thecylinder-port arranged between the inlet and outlet ports, two stop orsafety valves, respectively adjacent to the inlet and outlet ports, andin operative relation thereto, mechanical connection joining said twostop or safety valves, and appliances connected with the motor forautomatically and simultaneously opening one valve and closing theother, or vice versa; substantially as and for the purpose set forth.

10. The combination with a cylinder and piston of a hydraulic elevator,of a valve-casing having the usual inlet, outlet and cylinder ports, oftwo stop or safety valves for re- HERBERT A. BEIDLER.

Vitnesses:

J. LAWRENCE GERRY, MARY R. CLARKE.

